php根据值合并数组

Question

I am trying to send out emails to users from an array loop. Each email can be present in multiple array elements but, other than email, the rest of the elements are different.

I have this code below which tries to create populate two new arrays--one with just email while the other with other values, such as 'name' etc. What I finally need is an array which has something like:

$array_final(
             [0]email=>'whatever@com'=> (name1, name 2),
             [1]email=>"second@.com"=>name3,name4
            );

here are my arrays and the loop:

$array_emailedinfo_email = array();//will hold just email
$array_emailedinfo = array();//will hold email and other date; 

foreach($array_expiredmeetingscos as $mail) {

 if(isset($checkAgainst[$mail[1]])) {

    $array_emailedinfo_email[] = array(
                                             "email" => $checkAgainst[$mail[1]]
                                              );
    $array_emailedinfo[] = array( 
                                        "email" => $checkAgainst[$mail[1]], 
                                        "name" => $mail[2]
                                        );
        }
     }

I think I may be able to get the final array in the foreach loop itself but haven't figured that out. I have tried array_merge() etc but no luck, btw.

Any idea? Thanks.

Answer 1

Let's have two arrays:

$emails = array(array('email' => 'foo@example.com'), array('email' => 'bar@example.com');
$emails_info = array(array('email' => 'foo@example.com', 'name' => 'Alice'), array('email' => 'bar@example.com', 'name' => 'Bob'));

Now you would like to loop over $emails and find appropriate values in $emails_info :

foreach ($emails as $email) {
  $info = array_filter($emails_info, function($item) use ($email) {
    return $item['email'] == $email['email'];
  });

  // because $emails_info[index]['email'] might not be unique, $info is array of such items
  print_r($info);
}

But I think it would be much easier to index one or both arrays with given email, eg

//variable from your question
$array_emailedinfo['foo@example.com'] = array(array('email' => 'foo@example.com', 'name' => 'Alice'));

EDIT

Function which finds appropriate item in array:

function find_in_emails($emails_info, $email) {
    foreach ($emails_info as $email_info) {
        if ($email_info['email'] == $email)
            return $email_info;
    }
    //not found...
    return array();
}
//usage
//...loop...
$info = find_in_emails($emails_info, $email['email']);
//...endloop...

Answer 2

Here is how I fixed it. Note in the new code, $emails is the same as $$array_emailedinfo_email and $emails_info is the same as $array_emailedinfo in the original Question, respectively.

$array_all_expired_info = array();
$i=0;
$temparray = array();
foreach ($emails as $email) {
if (is_array($email)) {
    $array_all_expired_info[$i] = $email;
    foreach($emails_info as $all_info) {
        if (in_array($email["email"],$all_info)) {
            $array_all_expired_info[$i][] = $all_info;
        }
}
}
$i++;

}//for

The final array is close to what I needed: First element is just the email the rest are arrays inside the respective elements. So now I can loop through all the elements, grab the emails, then grab corresponding data (which could be multiple, per email) and simply send email.

This all wasn't easy. But learned a few things about php arrays in the process. Well worth it.

Thanks.